| 摘要 |
Some embodiments of the invention provide a system including a first system client operating on a first handheld device. The first system client can include a client interface for a user to create a message and a prompt for the user to select one of a first broadcast method, a second broadcast method, and a third broadcast method for transmitting the message. The system can also include at least one first server capable of transmitting the message via the first broadcast method, a network operations center capable of transmitting the message via the second broadcast method, and a carrier network capable of transmitting the message via the third broadcast method.
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